Dinner · Part 2 of 3: Instructions
Slow Cooker Rosemary Dijon Pot Roast Step-by-step instructions

- Prep
- Cook
- Total
- Serves
- 6
Before you start
Before beginning, ensure your slow cooker is clean and placed on a stable, heat-resistant surface. Remove the beef from the refrigerator approximately 20 to 30 minutes before you start to take the chill off, which promotes more even cooking.
Wash the baby red potatoes thoroughly under cool running water, pat them dry, and slice them into uniform halves to ensure they cook at the same rate.
Have all your measured ingredients, including the beef broth, Dijon mustard, and fresh rosemary, ready to go so that the assembly process is smooth and efficient. Clear enough counter space to comfortably maneuver the slow cooker and the ingredients, and ensure you have a sharp knife and a sturdy cutting board available for any final adjustments.
Ingredients at a glance (6)
- 3 lb beef chuck roast
- 1.5 lb baby red potatoes, halved
- 1 packet garlic herb seasoning
- 2 cups beef broth
- 3 tbsp Dijon mustard
- 2 sprigs fresh rosemary
Instructions
Assembly of ingredients
- Assemble the roastPlace the beef chuck roast into the bottom of the slow cooker. Arrange the halved baby red potatoes around the beef. Sprinkle the entire garlic herb seasoning packet evenly over the meat and potatoes to ensure deep flavor penetration during the cooking cycle.Look for The beef should be centered with potatoes surrounding it to allow even heat distribution.Tip Ensure the roast is as flat as possible to allow for consistent cooking throughout the meat structure.
At this stage, the beef is nestled at the bottom of the slow cooker, surrounded by the halved red potatoes. Everything is lightly coated with the garlic herb seasoning. The scene should look organized, with the ingredients ready to be submerged in the flavorful cooking liquid. Ensure the potatoes are evenly distributed to facilitate uniform cooking throughout the process.
Broth infusion
- Prepare and add the brothIn a glass measuring cup, whisk together the beef broth and Dijon mustard until smooth. Pour this mixture over the roast and potatoes in the slow cooker. Tuck the fresh rosemary sprigs into the liquid around the beef to infuse the sauce with aromatic herbal notes.Look for The liquid should partially submerge the ingredients without filling the slow cooker to the brim.Tip Whisking the mustard thoroughly into the broth prevents clumping and ensures a silky, well-emulsified sauce.
The Dijon and beef broth mixture has been poured over the beef and potatoes, and the rosemary sprigs are tucked into the sides. The aroma of the herbs and mustard should begin to fill the kitchen. The liquid should cover the base of the ingredients, signaling that the braising environment is ready for the long, slow cook.
Final slow cook
- Slow cook and serveCover the slow cooker and cook on low for 8 hours or high for 4 hours. Once the beef reaches an internal temperature of 145°F (63°C), remove it from the heat. Let the meat rest for 10 minutes before slicing against the grain to serve with the glazed potatoes and sauce.Look for The beef should pull apart easily with a fork, and the potatoes should be fork-tender.Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)Tip Letting the roast rest is essential to redistribute the internal juices for maximum tenderness.
The roast is now cooked, tender, and ready to be removed. The beef should look dark and succulent, and the potatoes should be tender and glazed by the reduced broth. The kitchen should smell savory and aromatic. Before proceeding to slice, confirm the internal temperature has reached the required safety threshold for a perfect, safe, and tender result.
Common mistakes
A common mistake is overcrowding the slow cooker, which prevents even heat distribution and can result in unevenly cooked potatoes or tough spots in the meat. Always ensure there is enough room for the liquid to circulate around the roast. Another error is failing to season the meat properly; while the packet provides a good base, ensure it is distributed evenly across all surfaces.
Avoid lifting the lid frequently during the cooking process, as this releases heat and moisture, significantly extending the cooking time. Finally, do not discard the flavorful liquid left in the slow cooker; it serves as a perfect au jus or base for a thickened gravy to pour over the finished slices.
How to tell it’s done
The pot roast is done when the meat is extremely tender and shreds easily with a fork. Use a meat thermometer to check the thickest part of the roast; it must reach a safe internal temperature of 145°F (63°C). The potatoes should also be soft enough to be pierced effortlessly with a knife.
Once done, it is crucial to allow the meat to rest on a cutting board for at least 10 minutes before slicing. This resting period allows the juices to redistribute throughout the roast, ensuring that every slice remains moist and flavorful. If you cut into the meat too soon, the juices will escape, resulting in a drier texture.
- Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest
Up next · Part 3 of 3
2 variations · storage & make-ahead · 3 answers · printable card
Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)